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Controller Calculating Machine Components

Controller Calculating Machine Components

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These objects were collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. Five of the eight have the dimensions given. These five hollow pieces have a gear at each end. The cavity running down the middle is round at one end and square at the other. The other three components are only.8 cm high. The short pieces have only one gear and a square opening. Pieces this shape are found on the shafts of the components of 1983.3003.18.
Compare to 311943.
Currently not on view
Object Name
calculating machine components
Controller Company
place made
United States: New York, New York City
Physical Description
brass (overall material)
overall: 1.4 cm x 2 cm x 1.4 cm; 9/16 in x 25/32 in x 9/16 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of L. Leland Locke
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History
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